利用皮埃尔·奥格天文台数据寻找活性-惰性中微子跃迁
Search for active-sterile neutrino transitions using Pierre Auger Observatory data
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中文总结 AI 辅助
该研究利用皮埃尔·奥格天文台数据,探索活性-惰性中微子的磁矩诱导跃迁,推导了1 TeV-100 TeV惰性中微子质量下跃迁磁矩的90%置信水平约束,拓展了相关参数空间的现有边界。
中文摘要 AI 辅助
我们研究皮埃尔·奥格天文台对超出标准模型的物理的灵敏度,该物理源于磁矩诱导的活性中微子与重惰性中微子之间的跃迁。这类偶极门户相互作用可增强中微子-核子在惰性中微子质量设定的运动学阈值以上的散射截面,进而导致超高能(UHE)中微子探测率出现可观测的变化。我们评估了这些相互作用对下行中微子和地球掠射中微子探测通道的影响,这两种通道的不同响应可区分增强的中微子通量与修改后的相互作用截面。基于未观测到UHE中微子候选体,我们针对1 TeV至100 TeV质量范围内的惰性中微子,推导了90%置信水平下依赖中微子通量的跃迁磁矩约束。在假设的通量场景下,所得的与味无关的限制将现有边界扩展至此前未探索的参数空间。
英文摘要
We investigate the sensitivity of the Pierre Auger Observatory to physics beyond the Standard Model arising from magnetic-moment-induced transitions between active and heavy sterile neutrinos. Such dipole portal interactions can enhance neutrino-nucleon cross sections above a kinematic threshold set by the sterile neutrino mass, leading to observable modifications of neutrino detection rates at ultrahigh energies (UHE). We estimate the impact of these interactions on both down-going and Earth-skimming neutrino detection channels, the contrasting responses of which enable discrimination between an enhanced neutrino flux and a modified interaction cross section. Using the non-observation of UHE neutrino candidates, we derive neutrino-flux-dependent constraints with 90% confidence-level on the transition magnetic moment for sterile neutrino masses in the range 1 TeV-100 TeV. Under the assumed flux scenarios, the resulting flavor-independent limits extend existing bounds into previously unexplored parameter space.